Stoker



July 11, 1933. H. M. SWINDLER 1,917,404

STOKER Filed Feb. 7, 1930 4 She ets-Sheet i 11v VE/VTOR A TTORNEYJ' July11, 1933.

H. M. SWINYDLER STOKER Filed Feb. '7, 1930 4 Sheds-Sheet 3 IN VENTOR ATTORNE V5 July 11, 1933.

Jig. 4.

H. M. SWINDLER Filed Feb. 7, 1930 STOKBR 4 Sheets-Sheet 4 \fl/ INVEN'TOR%BY\/ 2 W ATTORNEYS Patented July 11, 1933 UNITED STATES PATENT OFFICEHARRY M. SWINDLER, OF DAYTON, OHIO, ASSIGNOR TO THE JAMES LEFFEL & COM-PANY, OF SPRINGFIELD, OHIO, A. CORPORATION OF OHIO STOKER Applicationfiled February 7, 1930. Serial No. 426,480.

My invention relates to stokers.

It is an especial object of my invention to provide a hopperconstruction which is completely detachable and also slidable withrespect to the stoker mechanism in order to permit of the inspection ofthe stoker ram, to permit the free opening of the doors of the stokerand to permit of the removal of refuse products from the furnace abovethe stoker through the doors with respect to the hopper.

It is a further object to provide a combination between the hopper, theram and the retort whereby the fuel will be moved by the ram at eachstroke without the arching and bridging of the fuel which renders theaction of the ram substantially useless in delivering the fuel.

It is an object of this invention to provide mechanism that isespecially adaptable to the g limited area of the fire box of a Scotchmarine boiler and to provide means of cleaning and having access to theinterior of such a fire box without dismantling the stoker or its fueldelivery mechanism in order to withdraw refuse from the outside topportions of the tuyeres where it has been forced in the course of thecombustion of the fuel.

Referring to the drawings:

Figure 1 is a perspective of the ram end of the furnace;

Figure 2 is a top plan view thereof;

Figure 3 is a section on the line 33 of Figure 2;

Figure 4 is a section on the line 4-4 of Flgure 3 showing the method ofdelivering and arranging fuel with respect to the ram to prevent thebridging of the fuel.

Referring to the drawings in detail, 1t Wlll be understood that one ofmy primaryob'jects is to provide my construction in connection with aScotch marine boiler in which the fire box is circular, of very limiteddiameter and completely surrounded by water.

Asset forth, illustrated and claimed in my copending application SerialNo. 425,207, I have provided a stoker for insertion within the circularfire box of a Scotch marine boiler which has a retort having a bottomformed by the sliding pusher 1 which reciprocates upon the bottom ledges2 and 3 of the retort formed on the side walls 4 and 5. The legs 6 ofthe retort rest on the inside of the fire box 7 which is spaced from theoutside boiler wall 8. The pusher 1 is. connected to a ram 9 by thebolts 10. A cover plate 11. rests upon the top of the retort and issloped inwardly and upwardly as at 12 to facilitate the delivery of thefuel by the pusher and ram. The outer end of the retort likewise has acover plate 13 formed as a sliding support for the hopper 14 and itsbase casting 15 that is provided with the hand holds 16. The cover 13 isprovided with an opening 14a which coincides with the bottom opening 17of the hopper for delivery of fuel over the ram 9 and into the spaces 18between the side walls of the retort and of the ram to prevent thebridging of the coal or other fuel over the ram.

By allowing the fuel to drop down in the J spaces 18 the rain will movethe coal into the retort at points within the fire box at each strokewhereas if the fuel is permitted to arch over the ram, fuel cannot dropdown from the hopper 14 through the opening 17 and opening 14a andcannot be pushed into the fire box.

The cover 13 is provided with spaced shoulders 19 which engage the sidesof the hopper support 15 to guide it fore and aft over the ram. The ramitself is driven through the pitman 20 from the crank 21 suitablyoperated through the gear box and its gearing generally designated 22,which gearing is operated by the motor 23. The gearing of this gear boxand its associated mechanism is covered in my copending applicationSerial N 0. 425,208.

When it is desired to clean out the accumulation of clinker and ash onthe tuyeres 24 within the fire box, the hopper 14 can be drawn back toits rearmost position or completely removed from the plate 13 permittingthe swinging of the quadrant-shaped doors 25 and 26 outwardly on theirpivot pin 27 and the complete detachment of such doors if desired. Therefuse is drawn out of the fire box on to the plates 28 and dischargedlaterally off of the inclined portions 29 on to the floor about theboiler and stoker.

The quadrant-shaped doors 25 and 26 which engage the semi-circularclosure ring 30 fitted on the face of the boiler can be completelyremoved by reason of the following construction. The pivot pin 27 isheld at its top in a bracket 31 by a cross pin 32. It is seated at thebottom in a socket 33 in the plate 13. The doors each carry hinge straps34 and 35 mounted upon the pin 27. Hence, the removal of the hinge pin27 permits the complete removal of the doors and full access to theinterior of the fire box. In the Scotch marine boiler, this fire box isof very limited character and every inch of space must be availed of inorder to introduce the stoker mechanism and still have'room for completeaccess to the surface above the stoker for cleaning purposes.

The doors themselves are held in position, when closed, by the followingmechanism. Right angular latch members comprising a handle 36 pivoted onthe door at 37 and having a latch nose 38 which is limited in itsmovement by the stop 39 on the door. The door is held closed by apivoted locking lever 40 pivoted at 41 on the lower face plate 42closing the lower half of the front of the fire box. This lever engagesits outer end with the stop 43 which limits its rotation downwardly onthe outer end by reason of the weight 44.

The inner nd is provided with a. camshaped nose 45 that is engaged bythe correspondingly cam-shaped nose 35 so that the lifting of the handle36 depresses the nose 45 that locks the door shut and permits the doorto be opened by swinging on its hinge pin 27.

It is thus possible by this construction to both remove the doors andthe hopper or to withdraw the hopper and swing the doors open dependingupon the extent of the access to the interior of the fire box above theretort and tuyeres which may be desired.

It will be understood that I desire to comprehend within my inventionsuch modifications as may be necessary to adapt it to varying conditionsand uses.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is

1. In combination, a boiler having a fire box, a retort mounted in saidfire box in the lower half thereof, doors closing the upper half of thefire box, a fuel hopper mounted on said retort adjacent said doors, andmeans to slidably support said hopper with respect to the retort anddoors to permit its withdrawal into an inoperative position and theopening of the doors.

2. In combination. a boiler having a fire box, a retort mounted in saidfire box in the lower half thereof, doors closing the upper half of thefire box, a fuel hopper mounted on said retort adjacent said doors,means to slidably support said hopper with respect to the retort anddoors to permit its withdrawal into an inoperative position and theopening of the doors, and means supporting said doors adapted to permittheir detachment without disturbing said hopper.

3. In combination, a boiler, centrally hinged doors closing the upperhalf of the fire box thereof, a stoker in the lower half of the fire boxbelow the doors, a hopper slidably mounted on the exterior portion ofsaid stoker adjacent the doors and central pivot means for said doorsadjacent said hopper whereby said doors'may be swung outwardly when thehopper is withdrawn from adjacent the doors.

4. In combination, a boiler, centrally hinged doors closing the upperhalf of the fire box thereof, a stoker in the lower half of the fire boxbelow the doors, a hopper mounted on the exterior portion of said stokeradjacent the doors and central pivot means for said doors adjacent saidhopper whereby said doors may be swung outwardly when the hopper iswithdrawn from adjacent the doors and means for slidably mounting saidhopper on said stoker to permit its withdrawal from a point adjacentsaid doors without detachment from the stoker.

5. In combination, a retort having an opening, a reciprocating ramtherein reciprocating beneath said opening for delivering fuel into theretort, a slidable hopper mounted on said retort having a bottom openingadapted to coincide with the first mentioned opening.

6. In combination, a retort having an opening, a reciprocating ramtherein reciprocating beneath said opening for delivering fuel into theretort, a slidable hopper mounted on said retort having a bottom openingadapted to coincide with the first mentioned opening, and means on saidretort for guiding said ho per in its reciprocation.

7. In com ination, a retort, having an opening, a reciprocating ramtherein reciprocating beneath said opening for delivering fuel into theretort, a slidable hopper mounted on said retort having a bottom openingadapted to coincide with the first mentioned opening and means on saidretort for guiding said hopper in its reciprocation, said ho percomprising a hopper body and a sliding ase.

8. In combination, a retort, a reciprocating ram therein reciprocatingbeneath an opening for delivering fuel into the retort, a slidablehopper mounted on said retort having a bottom opening adapted tocoincide with the first mentioned opening, and means on said retort forguiding said hopper in its reciprocation, said hopper comprising ahopper body and a sliding base, said base having rear wardly disposedhand hold means for effecting its reciprocation.

9. In combination, a retort, a ram therein, said retort having a fueldelivery opening lid over the ram into the retort and enlarged chamberscommunicating with said opening within the retort on either side of theram for permitting the delivery of fuel to the sides of the ram as Wellas on top thereof within the retort whereby bridging of fuel isprevented, and a slidable hopper mounted on said retort for deliveringfuel to the fuel delivery opening in the retort and 'said enlargedchambers.

10. In combination in a boiler of afire box, a stoker mounted thereinextending out of the fire box, hinged doors for closing the upper halfof the fire box, a ram for delivering fuel, a retort for receiving fueland guiding said ram, 21 slidable hopper for delivering fuel to saidretort and ram adjacent said doors, and a refuse plate for receivingrefuse from said fire box and discharging it laterally to either side ofsaid hopper and ram.

i 11. In combination in a boiler of a fire box, a stoker mounted thereinextending out of the fire box, hinged doors for closing the upper halfof the fire box, a ram for de11ver-

